To be written

Notes:

• structure for wanted codecs and parameters for codecs
• structure for extra text
• other things

{ codecs:

[

{ codec: "opus", opus-bitrate: 64000 },

`{ codec: "telephone-event", events: "3-15" }`

],

addsdp: "x-edvina: hello olle\nx-edvina-topic: gardening",

}

These settings should override default parameters in configuration file

Note: If a wanted codec doesn't exist, an error will be generated and no call will happen